For those not familiar with Windows Home Server, you don't need to run raid to get redundancy. If you have more than one HDD in the server there is an option to "duplicate" all data so there is two copies of all the data with each copy being located on a different drive. This does also take up twice as much room for everything you store but if a drive ever fails you simple remove the drive and replace it and WHS will do the rest. WHS also doesn't have "drives" like a regular OS, it sees all the HDDs as one big drive so you can keep adding drives and it just increases the total storage on the machine. You can add IDE, SATA, eSATA and even USB drives to the mix and it just sees them all as one big drive. So far it is a great way of storing and protecting all my media and it give me piece of mind knowing that it backs up all my computers on my home network automatically and all the data is reduntant on 2 drives. You can also access all your data remotely with a website that the server host for you.